add August 2016 crawl and crawls from 2013 and 2014
add August 2016 crawl and crawls from 2013 and 2014

commoncrawl/cc-crawl-statistics,sebastian-nagel/cc-crawl-statistics,commoncrawl/cc-crawl-statistics,sebastian-nagel/cc-crawl-statistics,sebastian-nagel/cc-crawl-statistics,commoncrawl/cc-crawl-statistics